我是码头工人的新手。我只是试着在我的本地机器(Ubuntu 16.04)上使用docker和Jenkins。
我用下面的管道脚本配置了一个新作业。
node {
stage('Build') {
docker.image('maven:3.3.3').inside {
sh 'mvn --version'
}
}
}
但是它失败了，错误如下:
在unix:///var/run/ Docker .sock试图连接到Docker守护进程套接字时被拒绝
当前回答
2018-08-19
我已经被这个问题困了好几天了，因为我还没有找到一个完整的答案，关于为什么和如何，我将为其他偶然发现同样问题的人发布一个答案，上面的答案不起作用。
以下是在docker中运行Jenkins时的3个关键步骤:
You mount the socket /var/run/docker.sock to the jenkins container in order to be able to use the docker from the host. You have to install docker inside the container in order to use it. This is a great and simple article on how to do that. Note that newer versions might already have docker installed You run sudo usermod -a -G docker jenkins in order to add jenkins to the docker group. However, here you might run into a permission problem if the host docker and the container docker don't have the same group id so it is very important to adjust the container docker's gid to be the same as the host docker gid
您可以将此作为启动脚本的一部分，也可以使用exec并手动执行:groupmod -g <YOUR_HOST_DOCKER_GID> docker。
另外，不要更改/var/run/docker的权限。Sock到777或类似的东西，因为这是一个很大的安全风险，你基本上允许每个人在你的机器上使用docker
希望这能有所帮助
其他回答
在我的例子中，它只是启动docker服务:
sudo service docker start
在做生产配置时，我得到了权限问题。我尝试下面的解决方案来解决这个问题。
错误消息
ubuntu@node1:~$ docker run hello-world
docker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.38/containers/create: dial unix /var/run/docker.sock: connect: permission denied.
See 'docker run --help'.
解决方法:错误消息/var/run/docker.sock中socket的权限:
ubuntu@ip-172-31-21-106:/var/run$ ls -lrth docker.sock
srw-rw---- 1 root root 0 Oct 17 11:08 docker.sock
ubuntu@ip-172-31-21-106:/var/run$ sudo chmod 666 /var/run/docker.sock
ubuntu@ip-172-31-21-106:/var/run$ ls -lrth docker.sock
srw-rw-rw- 1 root root 0 Oct 17 11:08 docker.sock
更改docket权限后。Sock然后执行以下命令检查权限。
ubuntu@ip-172-31-21-106:/var/run$ docker run hello-world
Unable to find image 'hello-world:latest' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete
Digest: sha256:c3b4ada4687bbaa170745b3e4dd8ac3f194ca95b2d0518b417fb47e5879d9b5f
Status: Downloaded newer image for hello-world:latest
Hello from Docker!
This message shows that your installation appears to be working correctly.
To generate this message, Docker took the following steps:
1. The Docker client contacted the Docker daemon.
2. The Docker daemon pulled the "hello-world" image from the Docker Hub.
(amd64)
3. The Docker daemon created a new container from that image which runs the
executable that produces the output you are currently reading.
4. The Docker daemon streamed that output to the Docker client, which sent it
to your terminal.
To try something more ambitious, you can run an Ubuntu container with:
$ docker run -it ubuntu bash
Share images, automate workflows, and more with a free Docker ID:
https://hub.docker.com/
For more examples and ideas, visit:
https://docs.docker.com/get-started/
我在码头集装箱里查詹金斯。对我来说，最简单的解决方案是创建一个动态设置GID的自定义映像，例如:
FROM jenkins/jenkins:lts
...
CMD DOCKER_GID=$(stat -c '%g' /var/run/docker.sock) && \
groupadd -for -g ${DOCKER_GID} docker && \
usermod -aG docker jenkins && \
sudo -E -H -u jenkins bash -c /usr/local/bin/jenkins.sh
参见:https://github.com/jenkinsci/docker/issues/263
或者你可以使用以下选项启动jenkins:
-v /var/run/docker.sock:/var/run/docker.sock \
-u jenkins:$(getent group docker | cut -d: -f3)
这假设你的jenkins映像已经安装了docker客户端。参见:https://getintodevops.com/blog/the-simple-way-to-run-docker-in-docker-for-ci
我的成功
sudo usermod -a -G docker $USER
reboot
如果你在docker容器中运行Jenkins，而你的Jenkins链接到主docker，那么你可以通过下面的Dockerfile来修复这个问题:
FROM jenkins/jenkins:2.179
USER root
RUN groupadd docker && usermod -a -G docker jenkins
USER jenkins
